$upload->copy_to('/path/to/target');
+Please note the filename used for the copy target is the 'tempname' that
+is the actual filename on the filesystem, NOT the 'filename' that was
+part of the upload headers. This might seem counter intuitive but at this
+point this behavior is so established that its not something we can change.
+
+You can always create your own copy routine that munges the target path
+as you wish.
+
=cut
sub copy_to {